How do you understand that you're really in love?

you will never understand because it is very complex, you will just feel that it is really love, nobody could tell you nor describe it to you, you will just know within yourself what you experience is the greatest and wonderful feeling above all.

you never knew that it was true love.but you felt very happy.. and you feel inspired what you do

Whenever you are alone and suddenly remember the same person every now and then.
And when your heart starts beting fast.
When you see a face which pleases you.
When you communicate somebody even if not in person with...
Then these are the symptoms of love disease you have been suffering.
The remedy to this is....
Ask your love to massage your heart with some sweet words.

All the best from oarnamav.

It's a great fell which cannot be expressed in words,we cannot understand that you're really in love,but it should only felt in your heart